Cap for grease cups or the like



Juney 24 1924.- 1,498,702

N. R. THIBERT ET M.

CAP FOR GREASE CUPS ,0R THE LIKE Filed July 20. 1923 Patented June 24, 1924.

UNrrEu sr NAIYOLEON R. THIBERT, 0F WORCESTER, AND JOSEPH A. N. THIBERT, OF FITCHBURG,

MASSACHUSETTS. I

, CAP FOR GREASE GUPS ORv THE LIKE.

Application filed July 2Q, 1923. rSerial No. 652,841.

To all whom t may concer/n.'

Be it known that we, NAPOLEON R. THI- nnizr and JOSEPH A. N. THIBERn'citizens of the United States, respectively, residing at an opening. The object of the invention is tc provide simple and easily operated means by which the cap can be locatedk in position in its opening and prevented from being dislodged by vibration. The invention also' involves improvements 1n the features of construction and new combinations of parts as will appear for accomplishing said purose.

p Reference is to behad to the accompanying drawings, in whichA Y y Fig. 1 is a side view of an externally screw threaded cap for a grease cup constructed in accordance with this invention; Fig. 2 is a central sectional view ofthe same shown in the opening .of the grease cup4 and locked inl position.; f

Fig. 3 is a` View similar to Fig. 2 in part showing the parts of the device in unlocked condition; y

Fig. 4 is a plan of the cap as shown in Fig. 1;

Fig. 5 is a plan of the head of the screw for operating the locking means;

Fig. 6 is a plan of a part of the cap with the removable base taken away;

Fig. 7 is a plan of the knurled head of the screw removed from the shank of the screw and with the pin also removed, and

Fig. 8 is a side view of the collar on the bottom of the screw and connected parts.

The invention is shown as applied to a grease cup 10, such as is ordinarily used on locomotives, this cup having an internally screw threaded opening 11 through which it is filled with grease. The cap or other member 12 which is used ordinarily to close this opening is provided with an externally screw Ythreaded part 13 adapted to screw into the opening. The exterior of the main body of the cap is usually knurled to permit screwing it up ,by hand and -it is so shown,

The invention can be applied to any 4screw 13 or bolt.

This cap; is provided with an extension 14 Vof any desi-red form having a central ropening therethrough which is' screw vthreaded for'the reception of a` hollow screw 15. This hollow ,screw has a head 16, shown as of hex shape for an obvious purpose, andl provided with a passage 17 therethrough, the-purpose of which will appear later. The bottom of the screw 15 is flat. Thelongitudinal passage extending nearly through this screw is occupied byA ra hollow pin 18 which has a coil spring 19 therein. This vis shown as fixed tothe pin 18 by a cross pin -20 at oner end and fixed to the screw 15 at the bottom by securing its end'in a small passage inthe end of the screw. These two parts ltheretore are yieldingly connected together. On the end of the pin 18 is fixedaknurled head '21: Extending down from this lnurled head is a pin 22 eccentrically located and adapted to pass do-wn through the perorati'on`17f-into any one of a number of perforations V23'in thev extension 14. These perfor-ations V23 are concentrically arranged around the center of this'head and also the center 'of vthe screw 15.

On the 'bottom ofth@ screw 15 islacoll'ar 24 having a slot 25 in the bottom.l fThi-'scollar is screwed on the screw. The Vslot 251A is :for lthe reception of a locking: spring 26,

guiding it, and preventing the collar 24 from, turning with the screw. This spring is in the form of a bar extending across the inside of the hollow cap -12 and projecting outwardly, at both ends preferably, through slots 27 extending through the walls. The ends of this bar spring 26 are sharpened or formed into V-shape so that they will tit into the screw thread 11. I have shown a couple of projections 28 inside the cap 12 beyond the passages 27 to hold the bar spring in case it is drawn out and contracted. This prevents its accidental dislodgment. These projections extend only a short distance on the two sides of the end of the bar spring.

In the operation of the device the parts may be considered as in the position shown in Fig. 3. The operator pulls up' on the head 21 to remove the pin 22 from the opening 23 in which it may be located but not from the opening 17. Now by turning the head 21, of course, the head 16 willbe turned with itand the pin 18 as well as the screw l5 can be adjusted. This adjustment is to get the t-ension of the spring accurately adjusted and release the bar spring 26 from pressure so that by its natural resiliency its ends will be drawn in slightly so that the cap can be screwed in without resistance from this spring. When it is screwed in the head 2l is turned to turn the screw l5 and the parts contained in it downwardly to force down the central part of the spring 26 and force outwardly the ends thereof' into the screw threads. The operator adjusts the parts until he can feel that pressure is being applied and then he turns the head 2l to such a` position that the pin 22 can enterV some one of the openings 23 as shown in Fig. 2. The device then is located in this position and the cap l2 cannot be dislodged by any ordinary vibration.

When itis desired to remove the cap 12 'the head 2l. is pulled up as shown in Fig.

3 and turned backwardly to release the pressure on the spring 26 and then the cap can be removed inthe ordinary way.

This furnishes a lock which is sufficiently positive to preventaccidental displacement but is'easily unlocked to enable the operatorsv to removethecap for filling the receptacle. It kcan be applied to any caps screwing into an'opening in a receptacle oi any kind.

'Although we have illustrated and de-` scribed onlya single form of the invention we are aware of the fact that modications can be made therein by any person skilledY in the art without departing from the scope thereof. Therefore, we do not wish to be limitedto the details herein disclosed otherwise than as set forth in the claims but what We claim is l. The combination with a grease cup and a cap screwing into the top thereozt, of' means in the cap adapted to be projected through the wall of the cap against the threads on the cup for preventing the removal of the cap, comprising a bowed sprine` extending diametrically across the cap and having' both ends shaped to iit in the screw threads.

2. rlihe combination with an externally threaded member, ot a locking device inside it, a screw extending through the end otl said member and adjustable therein, and a collar on the screw engaging and having a slot tor Vguiding the locking device.

3. Ther combination with an externally threaded hollow cap or the like, oi a hollow screw threaded through the top thereof, of' a hollow pin movably located in the screw, a spring in the pin connected with the pin and screw to y'ieldinglj7 hold them together longitudinally and circumt'erentially detachable means for holding the screw and pin against turning, and means in the cap connected-with, and operated by, said screw for, preventing the cap from being removed from a threaded opening.

a. The combination with an externally threaded hollow cap` or the like, of a screw threaded through the top thereof, oi" a pin movably located in the screw, a spring connected with; the. pin and screw, means 'fior holding the screw and pin against turning, means in the cap connected with, and open ated by, said screw for, preventing the cap from being removed from a threaded opening, the means for preventing turning ot the screwy being adapted to be set in a plurality of different positions. f

ln testimony vwhereof we have hereunto aiiixed our signatures. 

